The invention relates to the field of battery safety, and particularly discloses a cumulative risk modeling method for judging the voltage consistency of a battery pack, The cumulative risk modeling method comprises the following steps of: S1, acquiring a time-varying single voltage value of a single battery; S2, calculating a voltage center value of the single voltage value; S3, calculating a first-order center moment between the voltage center value and each single voltage value; and S4, accumulating the first-order central moment to obtain an accumulated risk value of the single battery. The cumulative risk modeling method determines the voltage center value as a standard (step S2), represents a cell difference using the first-order center distance between a cell voltage value and the voltage center value (step S3), and represents a process in which the cell difference changes from a quantitative change to a qualitative change in time dimension and an abnormal change (step S4) by anintegrated method. Compared with an existing value domain method, a description statistics method, an internal resistance estimation method, a feature analysis method and other quantification methods, the cumulative risk modeling method can better represent the difference of the single voltage values, the discrimination degree of an accident vehicle and a normal vehicle is large, and the calculation amount of the cumulative risk modeling method is small.

    本发明涉及电池安全领域,具体公开了一种判断电池包电压一致性的累计风险建模方法,包括步骤:S1.获取单体电池随时间变化的单体电压值;S2.计算单体电压值的电压中心值;S3.计算电压中心值与每个单体电压值之间的一阶中心矩;S4.对一阶中心矩进行累计,得到单体电池的累计风险值。本方法确定作为标准的电压中心值(步骤S2),用单体电压值与电压中心值的一阶中心距表现单体差异(步骤S3),通过累计的方法表现单体差异在时间维度上从量变到质变的过程和异常变化(步骤S4)。相比现有值域方法、描述统计方法、内阻估算方法、特征分析方法等量化方法,本方法更能表现单体电压值的差异性,使得事故车和正常车区分度较大,且本方法运算量小。


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Cumulative risk modeling method for judging voltage consistency of battery pack


    Weitere Titelangaben:

    一种判断电池包电压一致性的累计风险建模方法


    Beteiligte:
    YAN ZHONGHONG (Autor:in) / ZHANG NUTAO (Autor:in) / YANG RUOHAO (Autor:in) / WANG PENG (Autor:in) / CHEN WUGUO (Autor:in) / MA JINGXUAN (Autor:in)

    Erscheinungsdatum :

    13.10.2020


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



    Method for evaluating consistency of battery pack and strategy for balancing battery pack

    GUO DONG-XU / FENG XU-NING / ZHENG YUE-JIU et al. | Europäisches Patentamt | 2021

    Freier Zugriff

    Expressway special section risk situation studying and judging method based on cumulative effect

    YE QING / LUO ZHONGBIN / WANG SHAOFEI et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    DANGER LEVEL JUDGING DEVICE, RISK DEGREE JUDGING METHOD, AND DANGEROUS DEGREE JUDGING PROGRAM

    OSAWA SUSUMU / YASUSHI MITSUO / FUKUDA TATSUYA | Europäisches Patentamt | 2023

    Freier Zugriff

    DUAL VOLTAGE BATTERY PACK

    YANG AN TAO | Europäisches Patentamt | 2019

    Freier Zugriff

    DANGER LEVEL JUDGING DEVICE, RISK DEGREE JUDGING METHOD, AND DANGEROUS DEGREE JUDGING PROGRAM

    OSAWA SUSUMU / YASUSHI MITSUO / FUKUDA TATSUYA | Europäisches Patentamt | 2024

    Freier Zugriff